Rob Marshall is directing Disney's film, which will be set 20 years after events in the 1964 title.

Lin-Manuel Miranda, the star and creator of Broadway's hit musical Hamilton, is in talks to join Emily Blunt in Disney's Mary Poppins sequel.

He will play the role of Jack in the new original musical. Sources say the story will center on the now grown-up Jane and Michael Banks, who have experienced a personal loss that results in the arrival of the magical Mary Poppins (Blunt). She teams up with her lamplighter friend Jack (Miranda) to help the family.

Rob Marshall will direct and also is producing with Marc Platt and John DeLuca. Marc Shaiman and Scott Wittman will be composing original songs and an all-new score. David Magee is attached to write the screenplay.

The character of Mary Poppins was first introduced to the world in PL Travers' 1934 book, which Disney adapted into the classic 1964 film starring Julie Andrews and Dick Van Dyke. Travers' wrote seven additional books about Mary Poppins that were published between 1935 and 1988.

Disney and Marshall are working with the Travers estate on the new project, which will explore more of the beloved nanny's world.

Miranda, who is repped by WME, Liebman Entertainment and Schreck Rose, not only stars as Alexander Hamilton in Hamilton, but also wrote the book, music and lyrics. The show has become a hot ticket since it opened on Broadway over the summer. Miranda previously wrote the music and lyrics for the musical In the Heights.

He already has a relationship with Disney as he's composing the music for the studio’s upcoming animated film Moana. Miranda also worked on the music for Star Wars: Episode VII — The Force Awakens. His previous acting credits include The Odd Life of Timothy Green and TV series Do No Harm.